Beersmith is about to release a recipe cloud add-on and upgrade which will be free for current 2.0 users (basic 10 recipe storage). The upgrade will also have a brew timer! These are a welcome additions, however I also WANT to use my ipad while at the brewery. Like most of us this is outside or in the garage. Beersmith does not run on any mobile devices. So this is what I do:
I have Gotomypc installed on the main computer with a registered beersmith install. Gotomypc has an ipad app which works very well to connect to the remote pc over the home wifi connection. I can also use gotomypc while at a friends house or local brewery to access and use beersmith from anywhere with an internet connection.
Gotomypc cost a monthly fee but TeamViewer is excellent and FREE. I have tested it with the same computer and the ipad and it works great.
I have looked at the security models of both these programs and they are fairly safe. Both use end to end encryption, and Team viewer seems a little more secure.
For windows machines, I also use Microsoft's cloud which lets you set up a graphical network of PC's that you can remotely access with a click or two. They keep changing the name but currently it is windows Azure and is also FREE for a couple computers.
Logmein also works well.